제출 #414489

#제출 시각아이디문제언어결과실행 시간메모리
414489aris12345678Rack (eJOI19_rack)C++14
100 / 100
9 ms8120 KiB
#include <bits/stdc++.h> using namespace std; const int mxN = 1e6+5; const int mod = 1e9+7; long long pow_2[mxN]; int main() { int n; long long k; scanf("%d %lld", &n, &k); pow_2[0] = 1LL; for(int i = 1; i < mxN; i++) { pow_2[i] = 2*pow_2[i-1]; pow_2[i] %= mod; } long long pos = 1LL; for(int i = n-1; i >= 0; i--) { if((k&1LL) == 0LL) { pos += pow_2[i]; pos %= mod; } k += 1LL; k >>= 1LL; } printf("%lld\n", pos); return 0; }

컴파일 시 표준 에러 (stderr) 메시지

rack.cpp: In function 'int main()':
rack.cpp:11:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   11 |     scanf("%d %lld", &n, &k);
      |     ~~~~~^~~~~~~~~~~~~~~~~~~
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